# clear_unused_tags

A destructive tool on the Anki MCP server.

Agent View of the PolicyLayer registry record for `clear_unused_tags`. HTML page: https://policylayer.com/tools/io-github-arielbk-anki-mcp/clear-unused-tags

## Facts

- Tool: `clear_unused_tags`
- Server: Anki (`@arielbk/anki-mcp`) — https://policylayer.com/tools/io-github-arielbk-anki-mcp.md
- Install: `npx -y @arielbk/anki-mcp`
- Homepage: https://github.com/arielbk/anki-mcp
- Risk category: Destructive (Critical risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Hidden

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "clear_unused_tags",
    "arguments": {}
  }
}
```

## Why clear_unused_tags is rated Critical

Although the description is empty, the tool name strongly suggests this performs an irreversible deletion operation on Anki tags. Clearing unused tags cannot be easily undone and represents permanent data loss. This fits the Destructive category (irreversibly deletes or overwrites data).

From the tool's own definition: "Tool name 'clear_unused_tags' contains 'clear', which typically indicates deletion or removal. The verb 'clear' in the context of tag management implies irreversible removal of tags that are no longer in use."

## Use case

AI agents call clear_unused_tags to permanently remove resources in Anki, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.

## Recommended policy (PolicyLayer)

Verdict: **Hidden**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Anki:

```json
{
  "version": "1",
  "default": "deny",
  "hide": [
    "clear_unused_tags"
  ]
}
```

## Other tools on Anki (97)

- `delete_decks` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/delete-decks.md
- `delete_media_file` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/delete-media-file.md
- `delete_notes` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/delete-notes.md
- `gui_exit_anki` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-exit-anki.md
- `manage_decks` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/manage-decks.md
- `model_field_remove` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/model-field-remove.md
- `model_template_remove` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/model-template-remove.md
- `remove_deck_config` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/remove-deck-config.md
- `remove_empty_notes` — Destructive — https://policylayer.com/tools/io-github-arielbk-anki-mcp/remove-empty-notes.md
- `anki_operations` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/anki-operations.md
- `gui_answer_card` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-answer-card.md
- `gui_deck_browser` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-deck-browser.md
- `gui_deck_review` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-deck-review.md
- `gui_select_card` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-select-card.md
- `gui_select_note` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-select-note.md
- `gui_show_answer` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-show-answer.md
- `gui_show_question` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-show-question.md
- `gui_start_card_timer` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-start-card-timer.md
- `relearn_cards` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/relearn-cards.md
- `reload_collection` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/reload-collection.md
- `study_session` — Execute — https://policylayer.com/tools/io-github-arielbk-anki-mcp/study-session.md
- `api_reflect` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/api-reflect.md
- `card_reviews` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/card-reviews.md
- `export_package` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/export-package.md
- `gui_browse` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-browse.md
- `gui_undo` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/gui-undo.md
- `multi` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/multi.md
- `request_permission` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/request-permission.md
- `sync` — Other — https://policylayer.com/tools/io-github-arielbk-anki-mcp/sync.md
- `cards_to_notes` — Read — https://policylayer.com/tools/io-github-arielbk-anki-mcp/cards-to-notes.md
- …and 67 more: https://policylayer.com/tools/io-github-arielbk-anki-mcp.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-github-arielbk-anki-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-github-arielbk-anki-mcp